Pulp-molding machine.



NQ- 2 .815 PATENTED AUG. 7, 1906.

c. 1). ORMISTON. PULP MOLDING MACHINE.

APPLICATION FILED APR. 13. 1905.

5 SHEETS-SHEET 1.

" WITNESSES: I g, E (Q mm/T03 v ATTORNEY,

No- 827,815. PATENTED 'AUG. 7,1966.

- c. n. ORMISTON.

PULP MOLDING MACHINE.

APPLIOATION FILED APR. 13, 1906.

5 SHEETS-SHEET 2.

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15 5; i7 19 :19 :5 15 y 26 =5 1 i8 fl 27 315; I I PATENTED AUG. 7, 1906.

G. D. ORMISTON. PULP MOLDING MACHINE.

APPLICATION TILED APR. 13. 1905.

5 SHEETS-SHEET 3.

WITNESSES: M qwavron,

W XQM NW ATTORNEY v PATENTED 'AUGQT 1906.

-5 SHEETS-SHEET 4.

0. D. IORMISTON, PULP MOLDING MACHINE. APPLIUATIOH FILED APR. 13, 19 05- -snares PATENT orrion.

CYRUS D. ORMISTON, OF LOCKPORT, YORK, ASSIGNOR OF ONE-HAL TO JESSE PETERSON, OF 'LOCKP'ORT, NEW YORK.

PULP-MOLDING MACHINE- Patented. Aug. '7, 1900.

Application filed s 1a, 19o5. stair m. 256.411.

To all whom it may concern:

Be it known that I, CYRUS D. ORMISTON, acltizen of the United States, residing atLockpIort, in the county of Niagara and State of ew York, have invented certain new and useful Improvements in Pulp-Molding Machines, of which the following is a specification.

This invention relates to pulp-molding machines.

The obi'lects of my invention are to provide means w ereby an opening can be formed centrally in a ulp article, to provide reducing-liners for t e molding-chamber whereby articles of various sizes canbe molded in said chamber, and to provide means whereby a smooth surface is given the molded article improvements in when being formed, thereby dispensing with the necessity of trimming heretofore resorted to for this pur ose.

With these eri sin view my invention consists in arranging within'the molding-chamber opposing rforated dies provided, respectively, wit a center former or tube and a center chamber into which said former or tube fits, in providing reducing-liners which fit into the molding-chamber, and in the supplemental imperforate dies whereby the surface of the article is given a smooth finish.

My invention further consists in the construction, arrangement, and combination'of partsto' be hereinafter described, and particularly pointed out in the ap ended claims.

- surface of the molded article receives the im- In the molding of pulp art1c es the stock is forced into the molding-space in a liquefied state, andprovision must therefore be made for draining'the water during compression of the stock. This is always done by providing the dies or formers with small drama e-perforations and facing the same wit fine screening-to prevent the stock entering said perforations and closing the drainage. The

ression of the screen and is therefore pitted.

eretofore in all cases Where a smooth surface was desired on molded articles it has been necessary to trim the same with a suitabletrimming-machine, necessitating rehandling and the expenditure of much time and. labor in trimming, which must always be done after the articles are thoroughly dried. As the material when dried is very tough, it is apparent that the trimming operationis necessarily slow.

My invention is designed for use on all articles where a smooth surface is desirable, such 'as' imitations of highlycles, and it is artlcu y designed for the manufacture o closet-seats and covers there'- for, which may be grained and varnished, and without the necessity of rubbing with gh polish and a perfect imitation of Wood.

As is well known, closet-seats. made of wood are liable to split, and are therefore unsanitary. This my invention fully overble, and when t up moisture.

Referring to the drawings, Figure 1 is a central vertical section of a moldin -machine embodying my invention, the mo ding-dies being positioned to allow the introduction of the stock into themolding-chamber. Fig. 2.

oroughly dried will not take olished wood artiplowdered pumice .or, horsehair be g1ven a comes as the s littin of the seat is impossi- J is a similar view of the upper portion of the r machine, the stock being compressed to almost its full extent. Fig. 3 is a view similar to Fig. 2 with the molding-dies lowered. Fig. 4: is a view similar to Fig. 1, with the lower die lowered and the upper'die elevated to render the partly-molded article accessible. Fig. 5 is a view similar to Fig. 2 with the stock-fully compressed and showing the supplemental die between the article and the up-- per die. Fig. 6 is a horizontal section t'alren on line y y, Fig. 2. Fi 7 is a perspective view of the supplements. die used inmolding closet-seats. Fig. 8 is a vertical section of the upper part of amolding-maohine embodying my improvements and adapted for molding covers for closet-seats. Fig. 9 is a horizontal sectiontaken on line 2 z, Fi -8. Fig. 10 isa sectional perspective view 0 the supplemental die used in molding covers'for closet-seats. Fig. 11 is a perspective view of the reducing-liner used in molding articles smaller than the size of the dome or housing.

Referring to the drawings in detail, similar numerals of reference refer to similar parts throughout the drawings.-

- The reference-numeral 1 desi ates the standards, whichare secured to a ange 2, eartending horizontally from the u per end of the lower water-cylinder 3,,whic as shown, may be supported b and extend through the floor 4. Said cyh nder is rovided with an inlet and outlet pipe 5 at its ower end and with a piston 6, having a piston-rod 7' extendadapted shown in Figs. 1 and 2.

. lower piston 6, which ing through the upper end of said cylinder. Secured to the upper ends o1" the standards 1 is the downwardly-opening dome or housing 8, having mounted thereon a cylinder 9, provided with the usual inlet and outlet pipes 10. Within said cylinder is an ejecting-pis ton 1]., having a through the head 0 the dome or housing.

,The parts thus far described form no part of my invention and may be constructed and supported in any manner desired.

drawings, being substantially oval; but it is p to. be understood that a circular, square, octagon, or any other shaped tube may be employed to form corresponding openings. The mo ding-face of said die-is provided with an annular groove 15, faced with screenin 16 V and being by preference slightly incline inwardly, as at 17, and provided with curved sides 18. The usual drainage-perforations 19 are provided, through which the water from the stock oozes when sub lected to pressure. Normally said die is he d against the 1 top of the dome.

A forming and supporting die 20 is secured to the upper end of the piston-rod 7 and is to be forced up into the dome, as

This die is preferably provided in its molding-face with a slight depression 21 ,faced with screening 22,v 1t having also the usual drainage-perforations ,j

is provided with a 24. Centrally said die chamber or pocket 25, into which the tube 14 of the coactl-n-g die enters when the die 20 is forced upward into the dome.

The initial operation of themachine is as follows: The up .er die is held against the top of the dome an the lower die forced upward .under pressure until it closes the lower open end of the dome, and the depending tube of the up er die enters the chamber orpocke-t in the lbwer die, as shown in Fig. 1. When in this position, a moldin -oham'ber 25 is formed, into which the stoci is forced under pressure thro h an inlet 27. The upper die, with its deperili'n tube, forms the top and inner walls of said 0 amber, the dome the outer wall thereof, and the lower die the lower wall, as clearly shown. When the stockenters the molding-chamber, the water immediately oozes through the 'drainageperfora tions in the lower die, and as soon as said chamber is filled the lower die is forced u ward by" hydrostatic pressureapplied to t e causes compression of the stock, and as the u per die is fitted with drainageperforations t e water oozes through 65 the eoactmg-dies, and a unlform drainage is iston-rod 12 extending upon t with the screened upper die.

I chamber in the upper an thereby obtained, this being necessary to i provide an article of uniform hardness and density. When the ed article passes the lower end of the dome and clears the walls of the same. In this partly-molded condition the water has almost entirely been forced from the stock, and the little remaining would be insufficient even'under pressure to pass through the drainage erforations in the upper die. 7 Therefore provide antimperforate supple mental die 28, having a central openin 29,

and its upper and lower face of substantially the same contour as the upper molding and jectin die. Said supplemental die is laid e partly-molded article when the lower or su porting die is lowered, as shown in Fig. 4, a ter which said die is elevated and the supplemental die brought: into contact Final pressure is then applied, and a perfectly-smooth article provided. The water or moisture, if any remains, may ooze through the drainage-perforations in the lower or supportin die.

As the cover for a closet-seat is usually smaller than the seat, I insert a reducingliner 30 into the domeand secure the same by bolts 31.

As no openin is re hired in covers for closet-seats, the e en ingtube and d lower dies, respees tively, are dispensed with. The en plemental die 32 is of course shaped to conli to the upper die, which forms. the exposed n In molding other articles I side of the cover. it may be desirable to lacethe supplemental die between the partly-molded article and the lower die. In order to prevent the formation of ridges on the molded artic1e,.I

33, which assure a finished product.

This invention is susceptible to. many changes in construction an arrangement of parts without departing from the principle 12o involved, and I therefore do not Wish to myself to the construction shown and described, as the same merely illustrates a representative way of applying my invention.

It is to be understood that claims it shall mean and include all manner and kind of material sufliciently porous or open to expelled v om the p p. I

, stock is almost com pressed to its full extent, as shown in Fig. 2,

with the lower or su This opposite movement may be imparted to the dies as soon as the pa'rtly-mold- 8o I 5 vide the supplemental dies with sharp es wherever the 12 5 word screening is used hereinafter in the ermit the passage of water to'be Having thus described my invention, what in coolperation with said coacting dies. 2- I nation wit t n a pulp-molding machine, the combination of coacting dies embodying means for drairing the water in the stock and having their molding-faces provided with screening, and means cooperating with said dies for removing the impressionof the screening from the stock during the final pressing action of said dies.

3. In a pulp-molding machine, the combination of coacting dies having their moldingfaces provided with screening, and a smooth supplemental die ada ted to be employed in cooperation with sai dies during the final pressing action of the machine.

Y 4. In a pulp-molding machine, the combi nation of coacting dies rovided with means for draining the Water rom'the stock introduced between said dies, and a supplemental die adapted to be laced between one of said coacting dies andt e stock, as and for thepurpose described.

5. In a 111 -molding machine, the combiiie dome or housing, of a perforated die having a projecting acting perforated die into whio ing portion fits, and an imperforate suppleortion, a cosaid projectmental die having an opening to permit the projecting portion of the first-mentioned die to pass thereinto.

6. In. a 111 molding machine, the combination wit t e dome or housing, of a perforated and screened die having a center projectin portion and an endless depression in its mo ding-face surrounding sa d promoting portioni said depression having its lnner wal incline toward said projecting portion and its side curved, a coacting die, and an imperforate supplemental die adapted to fit said depression.

7. In a 111 -molding machine, the comb1 nation Wit tiie dome or housing, of a perforated and screened die having a center projecting ortion and an endless depression in its mol ing-face surrounding said projectin portion, said depression having its inner wal inclined toward said projecting portion and its sides curved, a coacting die, and an imperforate supplemental die adapted to fit said depression and having a sharp edge to prevent the forming of ridges on the edge of the molded article. I

In testimony whereof I have afixed my signature in the presence of two subscribing witnesses. CYRUS D. ORMISTON. Witnesses:

A. H. FERGUSON, ERNEST H. HAINES. 

